make java components discovery follow symlinks

When `--with-java` points to a symlink, `find` should resolve it, making
the configure script work seamlessly with symlinks pointing to JDK
installations.

This fixes the confusing discrepancy between `--with-java=/path/to/java`
failing and `--with-java=/path/to/java/` working.

diff --git a/configure.in b/configure.in
index bc431fe..12874a2 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -2032,7 +2032,7 @@ then
        if test -d "$with_java_home"
        then
                AC_MSG_CHECKING([for jni.h])
-               TMPVAR=`find "$with_java_home" -name jni.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
+               TMPVAR=`find -L "$with_java_home" -name jni.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
                if test "x$TMPVAR" != "x"
                then
                        AC_MSG_RESULT([found in $TMPVAR])
@@ -2042,7 +2042,7 @@ then
                fi
 
                AC_MSG_CHECKING([for jni_md.h])
-               TMPVAR=`find "$with_java_home" -name jni_md.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
+               TMPVAR=`find -L "$with_java_home" -name jni_md.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
                if test "x$TMPVAR" != "x"
                then
                        AC_MSG_RESULT([found in $TMPVAR])
@@ -2052,7 +2052,7 @@ then
                fi
 
                AC_MSG_CHECKING([for libjvm.so])
-               TMPVAR=`find "$with_java_home" -name libjvm.so -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
+               TMPVAR=`find -L "$with_java_home" -name libjvm.so -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
                if test "x$TMPVAR" != "x"
                then
                        AC_MSG_RESULT([found in $TMPVAR])
@@ -2064,7 +2064,7 @@ then
                if test "x$JAVAC" = "x"
                then
                        AC_MSG_CHECKING([for javac])
-                       TMPVAR=`find "$with_java_home" -name javac -type f 2>/dev/null | head -n 1`
+                       TMPVAR=`find -L "$with_java_home" -name javac -type f 2>/dev/null | head -n 1`
                        if test "x$TMPVAR" != "x"
                        then
                                JAVAC="$TMPVAR"
@@ -2076,7 +2076,7 @@ then
                if test "x$JAR" = "x"
                then
                        AC_MSG_CHECKING([for jar])
-                       TMPVAR=`find "$with_java_home" -name jar -type f 2>/dev/null | head -n 1`
+                       TMPVAR=`find -L "$with_java_home" -name jar -type f 2>/dev/null | head -n 1`
                        if test "x$TMPVAR" != "x"
                        then
                                JAR="$TMPVAR"